JPH10195449A - Repairing apparatus for oven wall of coke oven chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repairing apparatus for oven wall of coke oven chamber capable of improving workability of repair of joint breakage on coke oven chamber oven wall. SOLUTION: This repairing apparatus comprises a lid take off device 10 for opening and closing a charging hole lid 11 of charging hole 9 of further front fifth kiln more than a charge kiln installed on a coke charging vehicle, a dusting material tank 29 loaded on the coke-charging vehicle and a liftable blowing pipe 28 with a lid for mixing a dusting material in the dusting material tank with a compressed gas, inserting the charging hole 9 from a charge oven and blowing the mixture into a coke oven chamber. Repair of joint breakage of oven wall brick can be practiced simultaneously with coke charging operation by blowing the dusting material from coke charging hole 9 of further front fifth kiln more than the charge kiln parallel to the coke charging operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for repairing joint breaks, cracks and the like generated in a brick wall of a coking chamber of a coke oven furnace.

[0002]

2. Description of the Related Art In a coke oven furnace, a heat storage chamber is provided at a lower portion of a furnace body, and a combustion chamber and a carbonization chamber each composed of about 20 to about 30 flues are alternately arranged above the furnace. The fuel gas and air (or air only in the case of rich gas) are preheated in the regenerator, introduced into the combustion flues and burned,
Heat is recovered in the adjacent heat storage chamber via the debit flue and then discharged through the flue.

[0003] The coking coal charged into the carbonization chamber is indirectly heated from the combustion chambers on both sides through the furnace wall and calcined, and the generated coke is extinguished by the ram mounted on the extruder through the coke guide vehicle through the fire extinguishing vehicle. Alternatively, a cycle of extruding into a coke bucket truck, charging coking coal into the carbonization chamber again, and firing is repeated. For this reason, the furnace wall brick of the carbonization chamber receives a temperature fluctuation from room temperature to 1200 ° C. every time due to the carbonization cycle, and receives friction and extrusion stress generated during coke extrusion.
Damage such as penetration, cracks, breakage, etc. occurs, and if left as it is, the furnace body strength and furnace life will decrease, or if the furnace wall penetrates, incomplete combustion will occur, black smoke from the chimney, and the carbonization temperature will decrease. There is a problem that trouble such as fluctuation occurs.

As a method of repairing a damaged furnace wall in the coke oven carbonization chamber, there are a method of spraying a mortar solution to a damaged portion with a spray nozzle, and a method of spraying a spray repair material together with a flame to the damaged portion. Due to work time, repairs cannot be performed during normal operation, and the carbonization chamber must be emptied for repairs, resulting in significant restrictions on furnace body protection, equipment, and the number of repairs. Have a point.

[0005] Further, the coke oven carbonization chamber furnace wall brick has a low operation rate, a periodic repair of moving machines such as an extruder, a charcoal truck, a coke guide truck, etc., and a kiln discharge operation interruption due to repair of ancillary equipment. If joint breaks occur and coking coal is charged and carbonization is continued as it is, the generated coke oven gas leaks into the combustion chamber through the joint breaks, causing incomplete combustion and generating black smoke from the chimney Cause pollution problems. In particular, during the recent steel recession, coke ovens had to be operated at a low load, and there were many joint breaks in the coke oven brick wall, especially at the top of the oven chamber. Have been.

[0006] As a method of repairing joint breaks in a coke oven carbonization chamber furnace wall brick, a refractory material fine powder (hereinafter referred to as a dusting material) is conventionally provided in the carbonization chamber while the pressure in the carbonization chamber is maintained higher than that in the combustion chamber. Is blown together with compressed air, and the dusting material is filled in the joint break and closed. For example, the dusting material is blown into the coking chamber together with the compressed air from the riser pipe, the pressure in the coking chamber is increased, and the blown dusting material is filled in the joint of the furnace wall of the coking chamber to close the joint. Method (Japanese Patent Publication 51-1
No. 3,481), a method of blowing dusting material into a pipe communicating with a lower portion of the hopper and blowing the dusting material into a pressurized carbonization chamber together with a compressed gas introduced from one end of the pipe. Method of injecting compressed gas from at least two nozzle tips inserted and fixed from one end of a lower pipe (Japanese Patent Application Laid-Open No. Sho 53-67701)
Publication).

[0007]

[Problems to be Solved by the Invention]
481 and JP-A-53-67701 disclose a method in which coke is extruded and then the carbonization chamber is made an empty kiln, and the joint of the entire carbonization chamber is made, as described in Examples. It is for repairing breaks, and one repair of joint breaks requires a long time, and if a large number of repairs are performed in a short period, the productivity of the coke oven is reduced accordingly. Further, in the method disclosed in Japanese Patent Application Laid-Open No. 53-67701, dusting material is blown from a coal charging port, so that the running of the coal-equipped vehicle must be hindered during that time, and the charging operation must be stopped during that time. Furthermore, the method disclosed in Japanese Patent Publication No. 51-13481 does not hinder the running of the coal-equipped car because the dusting material is blown from the riser. It has the disadvantage of requiring staffing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to improve the workability of repairing joint breaks in the furnace wall of a coking chamber by blowing dusting material from a coal filling port in parallel with the coal filling operation. It is an object of the present invention to provide a coke oven carbonization chamber wall repairing device which can be repaired.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a lid removing device for opening and closing a charging lid at a coal loading port five kilns ahead of a charging kiln installed in a coal loading vehicle, and a dusting material mounted on the coal loading vehicle. Tank and
The dusting material in the dusting material tank is mixed with the compressed gas, and is provided with an ascending and descending lid-injection pipe with a lid that can be lifted and lowered into a carbonization chamber from a coal charging port five kilns ahead of the charging kiln. At the same time, dusting material is to be blown into the carbonization chamber from the coal loading port 5 kilns ahead of the loading kiln. In this way, a lid removing device that opens and closes the charging lid of the coal loading port five kilns ahead of the charging kiln in the coal loading car, a dusting material tank mounted on the coal loading car,
The dusting material in the dusting material tank is mixed with the compressed gas, and a blowing pipe with a lid that can be lifted and lowered is installed, which is blown into the carbonization chamber from a coal loading port five kilns ahead of the charging kiln. Dusting material can be blown into the next kiln, which is 5 kilns ahead, while charging coal into the kiln, and repair damage such as joint breaks and cracks in the furnace wall bricks in parallel with the coal loading. can do.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a lid removing device for opening and closing a charging port at a coal mouth 5 kilns ahead of a charging kiln can open and close a charging lid at a coal port, and an open charging lid. As long as it can be evacuated from the coal mouth, it is not particularly limited, but it may be the same as a lid removing device that opens and closes the charging lid of a normal coal opening, or a simple lid removing device. Good.

In the present invention, mixing of the dusting material from the dusting material tank is performed by a method in which the dusting material is sucked together with gas by an injection feeder connected to a lower portion of the dusting material tank and supplied to the blowing pipe. A method in which the dusting material is dropped by a rotary feeder connected to the lower part of the sting material tank, and is supplied to the blowing pipe by compressed gas. The dusting material tank is filled with the dusting material and sealed, and high-pressure gas is blown into the interior. Any method such as a method of supplying the high-pressure gas to the blowing pipe while stirring the dusting material can be used. Also, as the high-pressure gas for transporting the dusting material, the dusting material injection kiln is an actual kiln, that is, in the case before the coke extrusion, gas is generated, so nitrogen gas is used, and also for carbon burning down If an empty kiln is being used, either air or nitrogen gas can be used.

In the present invention, the dusting material is blown into the coking chamber by feeding raw coal from a hopper of a coking car into a coking port on the furnace in the coking chamber where coke has been extruded and coke has been extruded. The lid is removed, the charging hood is mounted on the coal opening, and the coking is performed at the same time. That is, the plate valve at the riser bend of the coking chamber 5 kilns ahead of the coking extruded chamber is closed to separate the coking chamber and the air collecting main pipe, and the charging lid of the coal charging port is covered. It is opened by the device, a blowing pipe with a lid is inserted into the coal charging port, the dusting material is cut out from the dusting material tank, mixed with the compressed gas, and blown into the carbonization chamber until a predetermined pressure is reached.

Therefore, if the repairing apparatus of the present invention is used, the repair of the joint cut at the upper part of the furnace wall brick in the coking chamber 5 kilns ahead of the coking chamber from which coke is extruded in parallel with the coking operation will affect the coking operation. Can be carried out without giving any cracks, and the upper joint of the furnace wall brick can be repaired every time the kiln is removed from the kiln.Therefore, the leakage of the generated coke oven gas from the joint to the combustion chamber is suppressed, Generation of black smoke from the chimney due to complete combustion can be prevented. In addition, if the carbonization chamber 5 kilns ahead of the coke extruded chamber is being emptied due to the burning of carbon, repair of joints in the furnace wall bricks of the entire carbonization chamber will be carried out in parallel with the coking operation. Therefore, leakage of the generated coke oven gas from the joint break into the combustion chamber can be suppressed, and black smoke generation from the chimney due to incomplete combustion can be prevented.

As the dusting material used in the present invention,
It is only necessary to be able to float in the carbonization chamber and penetrate into the joints and cracks due to the pressure difference from the combustion chamber and to fill it by sintering.It is not particularly limited, but it is not particularly limited, but conventionally used quartzite, pyroxene, chamotte, Fine powder of refractory materials such as alumina,
Alternatively, a material obtained by adding an inorganic binder powder as a sintering material to the refractory material fine powder and adjusting the sintering temperature, a mixture of the thermosetting resin powder and the refractory material fine powder, or the like can be used.
If the particle size of the dusting material is coarse, the scattering and floating properties (this is related to the degree of diffusion due to the blowing pressure) are poor, and there is a problem that it does not fill fine cracks, and if it is too fine, it will pass without stopping at the crack Tend to do so. Further, when a large crack is first filled with a coarse dusting material and then a fine dusting material is used, the sealing effect is significantly improved. Therefore, the particle size of the dusting material cannot be determined unequivocally because it differs depending on the size of the joint breakage of the repaired portion, the size of the cracked portion, and the blowing method.
Hereinafter, it is preferable to use a fine powder having a particle size of 75% or less and preferably 90% or more.

[0015]

【Example】

Embodiment 1 Hereinafter, a repair apparatus for a coke oven carbonization chamber furnace wall of the present invention will be described in detail with reference to FIGS. 1 to 3 showing an embodiment. FIG. 1 is an overall side view of a coal-carrying car showing an installation position of a coke oven coking chamber furnace wall repair apparatus of the present invention, FIG. 2 is a side view of a coke oven coking chamber furnace wall repair apparatus of the present invention, and FIG. It is a front view of a coke oven carbonization room furnace wall repair device of the present invention.

1 to 3, reference numeral 1 denotes a coke oven;
Is a rail of a coal car 3 laid on the furnace of the coke oven 1, and the coal car 3 is mounted so as to be able to run in the furnace length direction. Reference numeral 4 denotes a hopper of the coal-equipped car 3, and reference numeral 5 denotes a charging chute for introducing raw coal cut out from the hopper 4 into the carbonization chamber 6, and a charging hood 7 is connected to a lower portion of the charging chute 5 so as to be able to move up and down. Reference numeral 8 denotes a device for repairing a coking chamber furnace wall, which is installed above the coking port 9 of the coking chamber 6 which is five kilns ahead of the coking chamber 6 for charging coking coal from the hopper 4 of the coking car 3 and 10 denotes a coking chamber furnace wall. Repair equipment 8
This is a lid removing device for opening and closing the charging lid 11 of the coal loading port 9 forming a part of the lid.

In the lid removing device 10, a lifting magnet 16 is swingably mounted on a reflex mag receiving frame 15 via a sliding lever 14 at a front portion of a carriage 13 which moves forward and backward along a guide frame 12 by a hydraulic cylinder (not shown). Since it has the same configuration as the opening and closing device of the charging lid 11 of the normal coal loading port 9, detailed description is omitted. The apparatus 8 for repairing the furnace wall of the coking chamber is connected to a guide frame 17 installed at a position above the coal loading port 9 at the center of the coking chamber 5 kilns ahead of the charging kiln by a chain to a machine frame 19 which can move up and down via rollers 18. 20 repair temporary lid 21
The machine frame 19 is guided by a hydraulic cylinder 23 through a chain wheel 22 at the upper end of the guide frame 17.
Chain wheel 2 that can be advanced and retracted by rollers 25 along
6 is connected to the chain 27 which is hung around, and by operating the hydraulic cylinder 23 to move the chain wheel 26 forward and backward,
The machine frame 19 is configured to move up and down along the guide frame 17.

The repair temporary lid 16 is provided with a blowing pipe 28 penetrating the center, and the upper end of the blowing pipe 28 has a dusting material tank 29 filled with a dusting material and sealed.
The opening and closing valve 30 of the cutout is connected by a hose 31,
If the on-off valve 30 is opened while blowing the high-pressure gas 32, for example, nitrogen gas and stirring the dusting material in the dusting material tank 29, the dusting material can be supplied to the blowing pipe 28 together with the nitrogen gas. . In the above-described embodiment, the case where the dusting material is blown from the charging port 9 in the center of the carbonization chamber has been described, but the dusting material may be blown from any charging port.

When the dusting material is blown into the coking chamber 6 by the above-described configuration, raw coal is cut out from the hopper 4 of the coal-equipped car 3 into the coking chamber 6 after coke is extruded by a table feeder (not shown). When charging from the charging port 9 through the charging chute 5 and the charging hood 7, the hydraulic cylinder (not shown) of the lid removing device 10 is operated to move the carriage 13 forward to lift the lifting magnet 16
Is dropped from the charging kiln onto the charging lid 11 of the coal charging port 9 in the middle of the carbonization chamber 9 five kilns ahead. Next, after the lifting magnet 16 is excited to attract the charging lid 11, the lifting magnet 16 is raised to open the coal opening 9, and the hydraulic cylinder (not shown) is again operated to operate the carriage 13.
Retreat.

Next, the hydraulic cylinder 23 is operated to retract the piston rod, the machine frame 19 is lowered along the guide frame 17 via the chain 27, and the repair temporary lid 21 is attached to the opened coal charging port 9. I do. Then, the high-pressure gas 32, for example, nitrogen gas is blown into the dusting material tank 29, and the on-off valve 30 is opened while stirring the dusting material inside, and the dusting material is injected into the blowing pipe 28 together with the nitrogen gas via the hose 31. Is supplied and blown into the carbonization chamber 6 to make it float. If the combustion chamber is under negative pressure, and before coke extrusion, the dusting material is cut off and cracked in the furnace wall brick in the upper space of the carbonization chamber 6. Penetrates into and fills, sinters and breaks joints,
Close the crack. In addition, if the carbon kiln and empty kiln are being used, the dusting material penetrates and fills the joints and cracks in the furnace wall bricks in the entire carbonization chamber 6 and sinters to close the joints and cracks. .

Therefore, by using the apparatus for repairing the furnace wall of the coking chamber according to the present invention, the dusting material can be blown into the coking chamber 9 five kilns ahead of the charging furnace during the coking operation.
Repair work on the furnace wall of the carbonization chamber can be performed extremely efficiently, and the generation of black smoke from the chimney caused by breaks and cracks in the furnace wall bricks can be significantly reduced.

It is to be noted that the hopper 4 of the coal-equipped car 3 moves from the carbonization chamber 6
After the charging of the raw coal into the coal chamber has been completed and the charging hood 7 has been lifted, the dusting material tank is simultaneously mounted with the charging lid 11 of the charging port 9 of the carbonization chamber 6 by a lid removing device (not shown). The blowing of the high-pressure gas 32 into the interior 29 is stopped, the on-off valve 30 is closed, the hydraulic cylinder 28 is operated to advance the piston rod, and the machine frame 19 is raised along the guide frame 17 via the chain 27. Then, the repair temporary lid 21 is attached to the charging port 9.
Let go. Thereafter, the hydraulic cylinder (not shown) of the lid removing device 10 is operated to move the carriage 13 forward to lift the lifting magnet 16 adsorbing the charging lid 11 from the charging kiln to the middle of the carbonization chamber 9 five kilns ahead of the charging kiln. Is moved over the opening 9, the lifting magnet 16 is lowered, and the
The charging lid 11 is placed on the charging port 11, and the charging lid 11 is rocked by operating a rocking cylinder (not shown) to mount the charging lid 11 on the coal loading port 9. The lifting magnet 16 is reversely excited and demagnetized. The lifting magnet 16 is raised, the hydraulic cylinder is operated, and the carriage 13 is moved backward to complete the dusting material blowing operation.

Example 2 Furnace height 6000 mm, furnace width 450 mm, furnace length 15600 m
In the coke oven group consisting of 106 gates of m, the repair apparatus for the coke oven carbonization chamber furnace wall of Example 1 was used,
For the black smoke generating kiln, dusting material was blown with nitrogen gas into the next coke extrusion kiln five kilns ahead of the coal charging operation.
Along with repairing the upper joint cut of the furnace wall brick,
As for the kilns for carbon burn-down empty kilns, dusting materials are blown during the coal charging work five kilns before the empty kiln ends and before the coking for charging coking coal, and the joints of the bricks in the carbonization chamber Cutting repair was carried out. The change in the number of black smoke generated from the chimney before and after the joint repair was investigated. FIG. 4 shows the results.

As shown in FIG. 4, the number of black smoke occurrences was about 40 / day before the joint break repair, but after the joint break repair, the number of black smoke occurrences was about several / day. And could be greatly reduced.

[0025]

According to the apparatus for repairing the coke oven wall of the coke oven of the present invention, the joint repair of the bricks of the oven wall of the coke oven can be carried out at the same time as the coking operation. The frequency of the joint repair can be increased, and the generation of black smoke from the chimney caused by the joint break of the furnace wall brick can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a coal-carrying car showing an installation position of a repair apparatus for a coke oven carbonization chamber furnace wall of the present invention.

FIG. 2 is a side view of the apparatus for repairing a furnace wall of a coke oven according to the present invention.

FIG. 3 is a front view of a coke oven coking chamber furnace wall repair apparatus of the present invention.

FIG. 4 is a graph showing black smoke generation status before and after joint repair in Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coke oven 2 Rail 3 Coal truck 4 Hopper 5 Charging chute 6 Carbonization room 7 Charging hood 8 Repair device 9 Charging port 10 Lid removing device 11 Charging lid 12, 17, 24 Guide frame 13 Dolly 14 Slide lever 15 Rif mag receiving frame 16 Lifting magnet 18, 25 Roller 19 Machine frame 20, 27 Chain 21 Repair temporary lid 22, 26 Chain wheel 23 Hydraulic cylinder 28 Blow tube 29 Dusting material tank 30 Open / close valve 31 Hose 32 High pressure air

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Shoji Kitani 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries, Ltd.

Claims (1)

[Claims] 1. A repairing apparatus for repairing joints and cracks generated in a brick wall of a coking furnace of a coke oven by injecting a dusting material from a coal charging port, five kilns ahead of a charging kiln installed in a coal loading car. A lid removing device for opening and closing a charging lid of a coal loading port, a dusting material tank mounted on a coal loading vehicle, and mixing the dusting material in the dusting material tank with a compressed gas to form a charging furnace. It consists of a blow-in pipe with a lid that can be raised and lowered freely from the charging port at the kiln tip into the carbonization chamber. In parallel with the coal loading work, dusting material is introduced into the carbonizing chamber from the charging port 5 kilns ahead of the charging kiln. An apparatus for repairing the furnace wall of a coke oven carbonization chamber characterized by blowing.